613986493 has 2 divisors, whose sum is σ = 613986494. Its totient is φ = 613986492.

The previous prime is 613986431. The next prime is 613986523. The reversal of 613986493 is 394689316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 612909049 + 1077444 = 24757^2 + 1038^2 .

It is a cyclic number.

It is not a de Polignac number, because 613986493 - 2²⁹ = 77115581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613986413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306993246 + 306993247.

It is an arithmetic number, because the mean of its divisors is an integer number (306993247).

Almost surely, 2^613986493 is an apocalyptic number.

It is an amenable number.

613986493 is a deficient number, since it is larger than the sum of its proper divisors (1).

613986493 is an equidigital number, since it uses as much as digits as its factorization.

613986493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The square root of 613986493 is about 24778.7508361499. The cubic root of 613986493 is about 849.9360934653.

The spelling of 613986493 in words is "six hundred thirteen million, nine hundred eighty-six thousand, four hundred ninety-three".